Forging machine



Nov. 22, 1927l Y I s. T. NELSON FORGING MACHIIUEEv Original Filed Jan. 26, 1923 Uhh., l M I im.; I zz o Z7 im 30 jk ltlatented blot-a SVEN 'l'. NELSON, 0F MICHIGAN CITY. Hill) lisaiasi rarest einen.

COMPANY, A CORPGRATH CIF MASSACHUSETTS.

FORGNG' Application Vllccl January 2G, 1923,`

illy invention relates to 'forging machines, and more particularly to vforging machines for use in sharpening cutter bits and similar implements. 1

An object ot my invention is to provide an improved forging machine.` A second object ot my invention is to provide an improved forging machine having improved die means for the 4formation and sharpening J oit blanlrs or dulled cutting implements.

ther objects and admntages ol my invention will hereinafter more jSully appear.

ln the accompanying drawings l have shown for purposes ol illustration one torni l5 ,which my invention may assume in practice. ln these draWings,-

l is a centrallongitudinal vertical section through a forging machine constructed in accordance With the illustative em- 20 bodiment of my invention.

2 is an enlarged View similar to Fig. l with portions broken away to show details ol construction, this View being more nearly a complete central section. i

mechanism proper. j

'ln the l'orm in Which lf haveillustrated my invention, the same comprises a main ran'ie` made up oi a bed casting l supported on a series oi legs a. The bed casting is provided'witli parallel guides n o in substantially the Same 'horizontal plane with the guides is arranged` a transversely extending crank shaft 5 driven by a com! bined driving pulley and flywheel 6 and having a crank pin 7 connected by al connecting rod 8 With a crosshead 9 slidable in the4 guides 3 and 1l. The erosshead carries there- 'with and pivotod upon a transversely ein tending pivotI l() disposed adjacent/the torward end thereof, a relatively heavy trame member ll. whose angle of oscillationabout the pivot l0 is limited as to oscillation for# Wardly by a stud l2 extending through a hole 13 disposed to the rear of the pivot, the stud being screwed into the crosshead 9. A heavy spring 15 whose `tension is adjustable by adjusting a plunger lo extends lbetween the rear end o'f the pivoted `memberll and the crosshead 9 and maintains the member ll always in the farthest position to which it `can turn in a cloalrvvise or forward direction.

Pivo-ted' to the Casting v,ll in iront O the l? ig. 3 is a front elevation of the forging and l and Miionrnn.

serial no. einem. Renewed muy 2i, 1927.

pivot as at 17 is Aa clapperfbox 1S which car ies rotatably mounted on a pair of parallel heavy studs 19 a pair ot annular dies j 2O Which cooperate to form a forming groove 2l. These dies 20 practically Contact at their upper portions 22, While they are cut away at their lower portions 22 to form grooves Whose combined cross section is the same as the desired cross section oi the tool to be sharpened thereby. i Upon the bed plate 2 between and below the guides 3 and et is mounted a'supplemental frame member 23 which carries a stationary die member 24- whose position may be adjusted by an adjusting screw 25, this die being arranged in .alinement -Wit-h the path of reciprocation of the dies and being adapted completely to lill the groove provided between the lower portions olf the dies 2O as the dies roll acrossit.` Slidable transversely ot' the .supplemental frame 23 is a member 26, whicl member is located just to the rear ol the stationary die 24. The member 26 is pro vided With a bit or blank receiving slot 27 Whose back and side Walls are'ilformed in the member 26, but which has an open front closed, in the Working position ont' the meinber 26, by a surfaceof the `ramemember 23 andthe stationary die 24. Suitable means for sliding the frame 26 laterally to 'effect discharge of a finished blank or bit is provided, but, as this mechanism forms no materialpart ot my present invention, .it requires no explanation, other than to say that by manipulation of a lever 28 the movable member 26 may be slid backand forth to discharge a bit.

"For the purpose of adjusting the vertical position of the bits in order that sullicicnt metal may be projectedV into the path oit the moving dies 20 to. lill out completely the points of the bits `which are to be formed, I provide a sliding Wedge 30 having an inclined surface 3l upon which the lov-Jer end of a blank 32de adapted to rest, the Wet member 30 having a rack 35 tormedat the bottom thereof and being longitudinally movable by a toothed sector 3a secured on a roch shaft/35 toi-Which suitable adjusting and locking means (not shown) is provided.

It Will be noted from Figure 2 that thevvedgek member constitutes an interlocking means for preventing possible lateral slipping of the bit holder during the course of sharpening.

The mode of operation of my improved mechanism will be readily apparent. Assume that the. slide 26A is in its proper position with the slot 27 therein in alineinent with the groove between the dies 20 and that the wedge member 30 has been moved to lock the member 26 against movement. A heated blank is then slipped into the slot/27 and slides to rest upon the inclined surface 31 of the wedge member 30. The pulley 6 is then caused to rotate the crank shaft 5 in anysuitable manner and the lower surfaces of the dies 2() engage the end portion of the drill bit or blank if the slidin wedge 30 has been suitably adjusted'by tie operator to bring this about. "Ihe dies 20 will then roll the projecting material out into such form as to completely iill up the groove between the dies 2O as this groove moves along and will also draw out the point of the blank to a shape as indicated in Fig. 2. The upper portions 22 of the dies QO'are so close together that no substantial escape of material between the dies is possible and, by virtue of the fact that a. plurality of dies are used, any jamming action of the metal is entirely impossible.

y While I have in this application specifically deseribed one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms without departing from its spiiit or the scope of the appended claims.

That I claim as new and desire to secure by Letters Patent is:

1. A forging machine for forming the cutting ends of cutter bits comprising a raised die against which the front face of the bit is to be formed, die means including a plurality of cooperating rooveddies for forming substantia-lly simu taneously the other surfaces of the cutting ends, said raised 'die being adapted to project within the grooves in said other dies, and means for causing relative movement between said projecting die and said grooved dies to effect forming of said cutting end.

2. A forging machine for forming the cutting ends of cutter bits comprising a projecting die against which the front face of the bit is to be formed, die means including a plurality of grooved rotatable dies for forming substantially simultaneously the other surfaces of the cutting end, said projecting die being adapted to extend within the grooves in said rotatable dies, and means for effecting relative movement between said projecting die and said rotatable dies to effect forming of said cutting end.

3. 'In a forging machine, a stationary pro-v jecting die, a pair of cooperating forming dies rotatableon parallel axes at opposite sides of said other die, said projecting die being adapted to extend between said other dies, and means for effecting movement of said rotatable dies relative to said projecting die.

et. In a forging machine, a raised die .i pair of cooperating grooved dies rotatable on parallel axes, said raised die being adapted to project upwardly within the grooves in said other dies, and means f or eii'ecting movement of said rotatable dlcs relative to said raised die.

5. In a cutter bit forging machine, a stationary raised die, a pair of cooperating grooved roller dies disposed on parallel axes and adapted to move in a straight path, means for supporting a bitblank at an acute angle relative to said path, and means for effecting movement of said roller dies relative to'said stationary die for forming the cutting end of the bit with clearance.

(i. In a cutter bit forging machine, a projecting die having lateral surfaces and a supporting surface, a pair of dies each having a lateral surface cooperating with a lateral surface on said other die, said projecting die and said pair of dies being relatively movable, means for supporting a blank adjacent said projecting die and at an angle to the direction of said relative movement, and means for effecting relative movement between said projecting die and .said grooved dies to effect forming of the cutting end of the bit with clearance.

7. In a forging machine, a projecting die, a pair of cooperating dies arranged toact simultaneously on a work piece, said projecting die being adapted to extend between said other dies, and means for effecting relative movement between said projecting die and said pair of dies.

8. In a cutter bit forging machine, a projecting die, a pair of cooperating dies, said projecting die being adapted to extend be tween said other dies, a pivotal mounting for said cooperating dies, and means for effecting relative movement between said projecting die and said other dies to ei'ect forming of the cutting end of the bit.

9. A cutter bit forging machine comprising a projecting die against which the front face of the bit is to be formed, a plurality of cooperating ilicscooperating with said projecting die to form the other surfaces of said cutting portion, said projecting die heilig adapted to extend between said other dies, a pivotal mounting for said plurality of cooperating dies, and means for cti'ecting relative movement between said projecting dic and said other dies. 'Y

1.0. In a forging machine, a pair of cooperating forming dies having surfaces cooperating to form a groove, a complementary raised die adapted to extend into the groove formed by said pair of dies, and

lill) `the cutting face means for effecting relative movement between said cooperating dies and said raised die. i

ln a forging machine, die means comprising a ing lateral surfaces forming a groove, a complementary raised die having lateral surfacesadapted to cooperate with Atlielateral surfaces of the groove formed by said other dies, and means for effecting movement of said cooperating dies relative to said raised die.

A forging machine for forming theV cutting ends of cutter bits comprising aprojecting die against which the front face of the bit is to be formed, die means including a plurality of dies for forming substantially simultaneously the other surfaces of the cutting end,v said to extend between said other dies, and `means for causing relative movement between said die and die means to effect forming of said cutting ends. y i e 13. A forging machine for forming the cutting port-ions of cutter bits comprising a projecting die against which the front face of each bit operated upon is to be formed, cooperating die means-having lateral suru faces cooperating with the lateral lsurfaces of said projecting die for forming the other surfaces of the cutting portions, and means for effecting relative movement between said die and die means, said die means including a die rotatable on an axis lying in a plane to which both the longitudinal axis of the bit in. process of formation and the direction of said relative movement between said die and die'means 'are parallel.

14. A forging machine for forging the cutting ends including` the face of cutter bits comprising the front face of the bit is to be formed, die means including a plurality each adapted to form only one of the other surfaces of the cutting end, said projecting die being adapted to extend between said separate dies, and means for causing relative movement between said die and die means to effect forming of said cutting ends.

15. A cutter bit forging machine comprising a die against which the front face of a bit is to be formed, and a plurality of swingingly mounted dies cooperating therewith to form the other surfaces of said cutting portion, and means for causing relative movement between said dies.

lfd. A 'bit forging' machine` for fori'ning the cutting portion of a cutter bit including thereof comprising a holder for receiving the shank end of a bit blank, a plurality of dies each adapted to form only one side of the cutting portion of the bit, and a raised die against which the front face of the bit is to be formed, said raised plurality of cooperating dies, havi projecting die being adapted l i ra plane parallel to a plane including a projecting die against whichV of separate d les tion of the bit and movable over said surface during forming thereof, anda projecting diehaving a lateral `surface adapted to cooperate with the lateral surface on said other die.

i8. A bit forging machine for 'forming the cutting portion ofk a cutter bit including the cutting face thereof comprising a blank holger, a plurality of ing the lateral bounding surfaces of a cutting portion of a bit, the axes of said latter dies being disposed laterally of said surfaces, and a projecting die adapted to extend between said separate dies.

i9. A forging machine for forming cutw ting ends on cutter bit tools comprising a pro l the front face of tool is to be formed, die means including a plurality of symmetrically arranged dies each adapted to form but one of the other bounding surfaces of the vcutting' end, said projecting die being adapted to extend be tween said other dies, rclativemovement between said die and die means to effect forming of said cutting ends.

20; A forging vmachine for forming cutting ends on tools comprising a die against which the front face of the tool is to be formed and die means including a pair of rotatable dies cooperatingto form between them a groove whose cross section corresponds to the cross section of the first mentioned diey formed on cutting said die by the axes of rotation of said second mentioned dies, and means for causing relative move- .ment between said die and die means to effect forming of said cutting ends.

2l. In a forging machine, a stationary raised die, a ram movable relative to said stationary die, and a pair of cooperating dies supported on said rain and rotatable on a-Xes spaced at opposite sides of said first mentioned die, the latter die being adapted to extend between said other dies.

22. In a forging machine, three cooperating dies, cooperating` among themselves to form all of the .bounding surfaces of the cutting portion of a cutting implement and each forming a diderent surface from each of the others, one of said dies being adapted to extend between said other dies, and means for effecting relative movement between said die and said other dies.

A` cutter bit forging machine coin- `prising a raiseddie againstWhich-the front face of a cutter' bit is formed, the transverse section of said diebeing substantially separate dies for formand means for causing.

ide'iiticalI to the transverse section of the cutting portion of a bit formed thereon, and a plurality of rotatable dies cooperating with said other die to form the lateral surfaces of the cutting portion, said rotatable dies having their axes disposed laterally of said surfaces so that said cutting portion is formed between the peripheri'es of said dies.

24. A cutter bit forging machine comprising a blank holder and means for forming the lateral surfaces and cutting face of the cutting portion of a bit held thereby, said means including a raised die and a plurality of rotatable dies, the latter being adapted to form said surfaces between their peripheriesl and 'said raised die to project between said rotatable dies.

25. A cutter bit forging machine comprising a cutter bit blank holder and means for forming the cutting face andthe lateral surfaces of the cutting portion of a blank held thereby, said means including a raised die and a plurality of rotatable dies, and means for effecting relative movement between said rotatable dies and said raised die,. said raised die being adapted to project between said rotatable dies at a predetermined time in said relative movement whereby said surfaces may be formed between the peripheries of said rotatable dies.

26. A forging machine comprising a raised die to form the cutting face of a cutter bit,- and a plurality of rotatable dies adapted to form the lateral surfaces of a cutting portion of said bit between the peripheries of said rotatable dies.

27. A forging machine comprising means for holding the shank end of a cutter bit` dies for forging the lateral surfaces and cutting face of the bit portion of said blanks, one of said dies being adapted to extend upwardly between said other dies, and means for effecting relative movement between said dies in a direction transverse to the longitudinal axis of a blank mounted in said holding means thereby to squeeze laterallyv simultaneously between said other dies both sides of the bit portion during forging thereof.

28. A forging machine for forming the cutting portion of a cutter bit comprising a projecting die against which the front face of the bit is to be formed, and cooperating die means movable relative thereto and having lateral surfaces cooperating with the lateral surfaces of said projecting die for forming the other surfaces of the cutting portiom'said die means including a die rotatable on an axis which traces during movement a plane generally parallel to the longitudinal axis of the bit.

In testimony whereof I affix my signature.

SVEN T. NELSON.

CERTHHCATE @E @@RRECTWN Paem Nw. 1,656,534. @famed Nvember 22, 1927 to SVEN 21X NELSQN.

it is hsrehy ceatifie that erro? appears im me prime@ sgeciication of the mme mmbee paient requiring cmron as ollows: Page line 53, after im ww "pivmed" inse: @he wmds mid numeral "as at i7", and line 54, after ik@ word "piw" srke om the words and numeral "as at l?" and insert instead the mumem "39% :and thai; me said Letrs Patent should be read wil these corremiams therein that the Same may @@nmm io the a'eeord of the case in the Panam Uff.

Sgneai and sailed this 17th day of January, A.. D. 3.928.'

M. E. Moore, Sea. Aetng Commissioner o Patents. 

